Chandler 543 - Page 4

-CHANICS IISTRUOIOIIS
TIMING LOOPER TO NEEDLE BAR
The usual procedure
for timing the Looper
and
Needle Bar, is
first to time the Loop-
er and then set the
height of the Needle
to the point of the
Looper.
This is ac-
complished as follows:
1
Insert new Needle
fuJl length
of the
Needle Bar hole and
tighten Screw A
(Fig.1)
2 As a preliminary
setting, make sure the
point
of the Needle is
approximately in line
with the center of the
Looper Shaft when the
Needle Bar is at the
1 owes t depth of its
stroke.
FIGURE 1
t.Boftom ol
( Neeel/e Sirek
FIGURE 2
Adjustment is made by means of Screw B (Figure 1).
FIGURE 2A
3 Turn the machine by hand, rotating the Looper counterclockwise,
thus raising the Needle 5/32 of an inch from the bottom of its
stroke as shown in Figure 2.
At this time, the point of the Lqoper should be barely visible on
the left side of the Needle as shown in Figure 2. To adjust,
loosen Screws C (Figure 3) and rotate Knurled Looper Holder
desired amount in either direction. Tighten Screws C securely.
4 There should be a space of light barely visible between the point
of the Looper and the Needle as shown in Figure 2A. Adjust for
proper
clearance by loosening Screw D (Figure 3) and moving the
Looper in or out the desired amount.
5 As a final
setting, now that the Looper is properly timed in re-
lation to the lift (or up stroke), the Needle Bar can be. readjusted
(as described in preceeding item 2) so that the point of the looper
when passing the Needle is approximately 1/32 of an inch above
the Needle Eye.
This- final setting may have to be varied slightly depending upon
the weight and softness of the thread or material being used.
The break of the loop (or loop formation) at the Needle Eye may
vary
according to the thread used. This will possibly require
setting the point of the Looper closer or further from the eye of
the Needle but within a range of approximately 1/32 of an inch.
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CHANDLER2
From the library of: Superior Sewing Machine & Supply LLC